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WILLIAM n. PnALL, on WASHINGTON, DIsTRIoT 'QFUOLUMBIA As'sIeNon To HIM- SELE ANDA. C. RAND, OFINEW YORKCITY.

Letters Patent No. 92,357, lated .nly 6, 1869.

The Schedule lreferred to in these Lettera Patent and making part of the game.

To all whom it 'may concern:

l Be it known that I,WII.LIAM E. PRALI., of Washington, in the county of Washington, and District of Columbia, have invented anew and useful Improvement in Water-Elevators; and I de ,hereby declare that thc following is a full, clear, andeiract description of the same, reference being had to the annexed drawings, making part of this specification, lin which- Figure 1 is an elevation -of my improved elevator, and

Figure 2 is a vertical sectional elevation of the same.

Corresponding letters, in both figures, refer to corresponding parts. l

This invention relates to that class of devices which elevates water by means of steam, which is generated within the device for raising the water, and'which isy then. condensed therein, furthe purpose of forming a vacuum for permitting the influx of more water, and it is designed as an improvement 011 the one for which Letters Patent were granted to me ou the 21st day of April, 1868, it consisting of a new combination and arrangement of the parts of which it is composed, as will be more fully described hereinafter.

A, in the drawings, represents a vessel, into which 'the water enters from the well or reservoir, when the device is in operation.

To the lower portion of this vessel, there is to be secured a i e or conduit- A which ma be a cons v y stituent part of such vessel, or it may be a separate piece, and be secured thereto in any suitable manner.

This pipe or conduit extends downward for .some distance, when it 'is to be bent or curved, as shown in the drawings, and is to 'extend upward for a suitable distance, andlthen outward in a horizontal direction, and trrlinatein a somewhat enlarged portion A2..

It will be apparent, .that each-of the parts marked A Al A2,` may be cast or formed ofi-separate pieces, and screwed or otherwise secured together, but, as a matter. of convenience, I prefer to cast or form them in one piece.

That portion of the pipe or conduit A above referredto, I designate and propose to use as the steamgenerator, it being supplied with water, as will be more RJ-fulj.-y described hereafter.

The location and dimensions of this generator should be such that the amount of water v contained therein, will always be less than the amount which the vertical arm of the pipe A contains, so thatv as the water is expelled from the generator, the hot water will not be forced ont of such pipe.

B represents an induction-pipe, which is to be secured to the lower portion of the vessel A, and is to ex tend down into the well o r other source of supply, and is tobe supplied at its lower end with an ordinary or any suitable check-valve.

. This pipe may be secured to the vessel in any of the well-known ways, the most convenient beiugthat of a nut upon its end, which shall screw upon a projection upon the vessel.

vC- represents the water-discharge pipe, which is to be secured to the upper portion of vessel A, and is to have-within it, at a short distance above such vessel, a check-valve, opening upward or outwardrf'or preventing the return of the water from such pipe to the vessel. This pipe is `to be of any length required, to

carry the water to the desired location, and may he bent or otherwise arranged with reference to that end.

.D represents a bent pipe, one end of which is scoured to the upper portion of vessel A,'above which it rises verticallyfor a considerable distance, when'it is bent or otherwise caused to turn downward, -in which direction it extends in a line nearly parallel with the upwardly-projecting portion, and until it reaches the vertical portion of the pipe or conduit A, to which it is joined, and with which it is made to communicate,

for a purpose which will shortly be explained.

E represents a pipe, which is -to be attached to the upper surface of the steam-generator, from which point vit is to extendinward toward the pipe 1),"but before reaching which fit is to bc bent downward to a point somewhat below the lowerv-portion of the generator, or it may be to any point to which it is desired to discharge the water from 'the generator, as it is apparent that by the location of this pipe, thc quantity of water discharged may he regulated, when it is to be so bent or formed as to rise vertically alongside of pipe D and enter the same, or communicate therewith at a point somewhat above the upper surface of the steaxngenverator.

F represents a pipe, which communicates with the discharge-pipe C, at a point above the check-valve a, and which extends across, and is connected to, and communicates with the downwardly-projecting portion of pipe D.

Upon that end of pipe F, which enters pipe D, there 4is to be placed a small nozzle, which extends upward for a Ashort distance within pipe D, which is for the purpose oi" introducing a jet of coldwater from the discharge-pipe O into the condenser, which consists of the upper portion of the bent pipe D.

I The Aoperation of my improved water-elevator is as follows: v

The parts, havmg been constructed as above described, and arranged as shown in the drawings, are

to be illed with water np to or about to a level with thejtop of the vessel A, when the steam-generator, o r th'atportion marked A2, is to be placed in contact with afire prepared for that purpose, when steam willA be gynerated therein, which steam will forcethe water 'from A into the vessel A and from thence through thefdischarge-pipe 0 to the desired locality.V

It is apparent, however, that not all of the water contained in the pipe Al will bc discharged, for the reason that so soon as the water has been driven below the lowest point in pipe E, the steamwhich had previously acted upon the water, vwill be allowedy to pass through pipe E" into D, in the upper portion of whichit will be condensed by the jet ot' water, which will enter through pipe F.

The condensation oi' the steam as above described, will, of course, produce a vacuum in the pipel D, the effect of which will be to permit water to flow through the pipe B into vessel A, and thus rell the same, and also rell the generator with the hot water which was retained within the pipe A, so that it will be seen that the generator is, after the first discharge of water, always refilled with hot water, and that thus a great economy of fuel is produced, especially as the steam used, in raising the water, is condensed and returned to the generator.

Theotlice of the pipe E is to allowany steam, which ma)r be in the generator, to escape after it has drivenV the water below the lowest point in such pipe, and

thus permit the generator to reillwith the water previously contained therein, as it is apparent that such water will not be expelled from the pipe A, but only the cold water, which was contained in the opposite leg of the pipe to the one into' which the hot water is forced from the generator.

In addition to the function of a condenser, described as being performed by the upper portion of tube I), it will be seen that it acts as an air-chamber, the air contained therein pressing equally upon thet-wo columns of water, and thus preventing the water, in either col umn or portion of the pipes, from passing tothe other -column or portion, which would sometimes be the case were it not for the air in the pipe D. l

As a further safeguard against the passage of the-- water from one portion of thepipe to the other, I propose to use perforatedv diaphragme in the pipes, one` in each portion thereof, so that in the event of any -sudden commotion in the wat-er within the device,` caused by the closing of the valve, or the generation'A lshown and described.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

i \V. E. PRALL. Witnesses:

D. P. HoLLowAr, A. IiUPPERT. 

